Same thing was happening with mine. It came and went. Mostly I felt it upon acceleration. I inspected the drivelines (aftermarket rear), and u-joints (stock), but apparently I didn't check the u-joint well enough-- 4-5 weeks after it started, my u-joint shattered and my driveline dropped to the pavement. Check that u-joint VERY well.

The stock units used a Rzeppa joint which cannot be rebuilt to my knowledge. I suggest that it is time to go with a Tom Woods or JE Reel rear drive shaft - you can get a bolt in replacement or you can pull the flange connection and go with a U joint yoke. You can also find a lot of stock rear DS's on eBay - I picked up a spare rear shaft for 10 bucks...

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I have the same vibration in mine. I have an auto 4 dr. The front driveshaft is a Tom Woods and the rear is stock. I have been driving this way for a couple of months now. It doesn't happen all the time but when it does it sems to be while accelerating. I still haven't figured out what the issue is.

I have the same vibration in mine. I have an auto 4 dr. The front driveshaft is a Tom Woods and the rear is stock. I have been driving this way for a couple of months now. It doesn't happen all the time but when it does it sems to be while accelerating. I still haven't figured out what the issue is.

I hope you adjusted the pinion angle correctly, if not that driveshaft isnt going to last very long.....If you did I would recheck it, there should be no vibrations.

bkerry, I would take off the rear driveshaft and slap it in 4high and drive around to see if its the actual rear driveshaft making the vibrations. Does it happen accelerating? decelerating? Its posible that its just isnt balanced properly....When you retorqued the pinion nut when you changed seals did you use a new pinion nut and torque it properly? Check for any play in the flange when you take the DS off, there shouldnt be any.